Blumenthal reported he and his wife, Cynthia Malkin Blumenthal, had 2009 income of between $5.2 million and $34.7 million, in large part from her New York City real estate holdings that include interests in the Empire State Building.

In his 65-page report, Blumenthal, the Connecticut attorney general since 1990, said his assets last year were valued at between $37 million and $75 million, with at least 26 other assets valued at over $1 million each held by either his spouse or one of their four children.

Mrs. Blumenthal's grandfather founded the New York-based property company now known as Malkin Holdings.

McMahon, who stepped down as World Wrestling Entertainment CEO last September, and her husband own shares in companies ranging from Disney to McDonald's to ING Group.

The McMahons had income of between $9 million and $13.9 million, consisting of dividends, capital gains and interest. McMahon's 115-page financial disclosure report shows she and her husband owned assets last year that were valued at between $103 million and $370 million.

McMahon has spent more than $15 million of her own money thus far in her bid for the Senate. She has indicated she may invest up to $50 million in the race.

Recent public opinion polls show that Blumenthal holds a comfortable lead over McMahon.

Blumenthal's disclosure report also showed that his wife maintained a checking account with JP Morgan Chase valued at between $1 million and $5 million. Likewise, a trust for son Michael L. Blumenthal held a JP Morgan Chase checking account with more than $1 million in it. A custodial account for daughter Claire had a checking account with JP Morgan with a balance of between $500,000 and $1 million, the report showed.

Senate and House rules require members and candidates to submit annual financial disclosure statements that account for holdings, income and liabilities in broad terms, with ranges for each, rather than a specific amount. Lawmakers' personal residences are not included.